A 3-minute lesson from the Louisiana course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Weather and traffic can change in seconds. Manage the space around your car with speed, lane position and communication, and match your driving to open, closed or changing conditions.
Know the rule
In a heavy downpour or fog, slow down and turn on your low-beam headlights.
If fog is so dense it impairs your vision, don't drive at all. If you must, slow down and get off the highway at the nearest place you can stop; creeping along at 10 to 20 mph on the highway risks your life.
Be ready for an emergency stop: red taillights ahead may be a stopped or barely moving vehicle. Tap your brakes to warn drivers coming up too fast behind you.
City driving is harder for new drivers because there's more to sort out. Slowing down gives you time to see pedestrians and hazards, predict what might happen and react.
Thick fog rolls in on the highway and you can barely see the car ahead. Switch to low beams, slow down, and take the next exit or safe place to stop and wait. Don't creep along at 15 mph in a travel lane.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
Fog becomes so dense that you can barely see. What does the handbook say to do if you must keep driving?
Continue at 10 to 20 mph with flashers on
Switch to high beams to see farther ahead
Follow closely behind the taillights ahead
Slow down and exit at the nearest safe place
Answer: Slow down and exit at the nearest safe place
Creeping along at 10 to 20 mph on the highway risks your life; slow down and get off the highway where you can stop.